Hoisting device.



C. A. SIGAFOOS.

HOISTING DEVICE. APPLIGATION FILED 1211.11, 1913.

Patented Nov. 24, 1914.

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Clark A. Sl"5afoos,

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G. A. SIGAFOOS.

HOISTING DEVICE.

APPLICATION FILED APR.11, 1913.

1,1 18,241 I Patented Nov. 24, 1914.

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THE NUPOIQ PETERS C0,, PHGTU-LITHLL. WASHINGTON. 0. c

UNITED STATES PATENT curios.

CLARK a. sIGAroos, on OMAHA, NEBRASKA.

HOISTING DEVICE.

Application filed April 11, 1913.

H) all whom it may concern:

Be it known that I, CLARK A. SIGAFOOS, a citizen of the United States,and a resident of Omaha, in the county of Douglas and State of Nebraska,have invented cer tain new and useful Improvements in Hoisting Devices,of which the following is a specification.

My invention relates to elevating and hoisting mechanism, and has forits object the provision of a hoisting mechanism having a separable ordetachable table or platform provided with wheels or casters whereby thesame may be used as a truck for the conveyance of the materials to behoisted and for storing such materials until desired for use.

My invention is especially useful in connection with the printingtrades, and provides means whereby large quantities of paper whenreceived may be placed at once on a wheeled conveyance, left in place onsuch conveyance until desired for use, and then elevated so thatportions of the material may be conveniently transferred to the feedtable of a press.

In the accompanying drawings,Figure 1 is a front elevation of mechanismembodying my invention, Fig. 2 is a side view of the same, Fig. 3 is abottom view of the wheeled platform, and Fig. 4 is a perspective view ofthe same when loaded.

In carrying out my invention 1 provide a frame having a pair of verticalguide members of which the lower ends rest upon and are secured to afloor so as to leave an open and unobstructed space upon the floorbetween them. In the illustrated construction each of the vertical guidemembers comprises a pair of angle-bars 1 of whichthe ad acent flangesare disposed parallel.

and in spaced relation to each other. Each pair of the bars is securedto a base-plate 2 resting upon the floor A, and at their upper endscarry the heads 3 and 4:. The heads are connected to each other byhorizontal transverse members 5, and have suitable bearings therein forthe ends of drum-shaft 6. On said shaft adjoining the heads are thehelically-grooved drums7 to which are connected the ends of the cables 8which extend downwardly and are connected to the lifting-heads 9. Saidheads are slidably mounted on the vertical guide-members. 1, beingmovable independently of each other, except in so far as their actuatingmechanism is in common.

Specification of Letters Patent.

Patented Nov. 24, 1814.

Serial No. 760,560.

On the drum-shaft 6 is secured a gear 10 which meshes witha pinion l1carried'on a shaft 12. A gear 13 on the shaft 12'1neshes with a pinion14. carried on a shaft 15. On the latter shaft is a sprocket-wheel 16which is connected by a chain 17 with a sprocketwheel 18 on thecrank-shaft 19. The latter shaft is suitably mounted in a bracket 20secured on the outer side of one of the guide members. and at the outerend of the shaft is carried a removable crank 21 by which the shaft maybe turned. Adjacent to the sprocket wheel 18 a brake-wheel 22 is securedon the shaft 19, a brake-band 28 extending around the wheel and havingone end connected to the bracket 20 and the other end connected to alever 24: which is pivoted on the bracket as shown in Figs. 1 and 2. Apin-25 is provided which may be passed through an opening in the bracket20 into a hole inthe side of the brake-wheel, to prevent rotationthereof and thus lock the actuating mechanism to retain thelifting-heads in elevated position. I Each of the lifting-heads has aflangeportion' 26 extending inwardly from the guide-members 1. and onthe upper sides of each of said flange port ons are a pair of conicalpins 27. The table or platfo m .28 has at each end thereof a pair oferforate lugs 29 which are spaced so as to adapt them to fit a ound thepins 27 on the flanges of the lifting-heads. Similar lugs 30 are placedat the s de of the platfo m. and a forked tongue 31 is pro ided whichmav be detachably engaged with any air of the lugs. caster-wheels 32,and when the same rest u on the floor A and the tongue is engagedwithapair of thelugs 29 or 30.as shown in Fig. 4, the platform may heused as a truck for the conveyance of the materials with wh ch it may beloaded.

l/Vhen it is desired to hoist materials carried on the truck, thelifting-heads 9 are moved down to a position near the floor A, and thetruck is moved to a position between them so that the lugs 29 are abovethe pins 27, as shown in Fig. 1. The crank 21 is then turned by hand tooperate the drum-shaft and wind the cables 8 upon the drums 7, thusraising the lifting-heads. The flangeportions 26 engage the lower sideof the platform 28. the pins 27 passing into the openings in the lugs 29so that the platform is retained in a proper central relation to the Onthe bottom of the platform are heads, and the platform is carried up bythe heads as indicated by dotted lines in Fig. 1.

When used for handling paper, the hoisting mechanism may be placedadjacent to the feed-table of a press B, as shown by the dotted lines inFig. 2. The platform with its load of paper is then elevated so that aconvenient part of the pile is above the level of the press feed-table,and the desired portion of the pile C is transferred to the table. '1 heplatform may then be further elevated, as desired, being held in thesuccessive positions by the use of the pin 25, as described.

When it is desired to lower the platform, either when empty or partiallyunloaded, the locking-pin 25 is withdrawn from the brake-wl'ieel, thebrake-lever 24 is moved to clamp the band 23 around the wheel, and thecrank 21 is taken off the shaft 19. The Platform is then allowed todescend by its own weight, the movement being controlled by clamping thebrake-hand more or less tightly upon the brake-wheel. Nhen thecasterwheels reach the floor A. the lifting-heads 9 continue to movedown until they are completely disengaged from they platform, afterwhich the same may be wheeled away and replaced by a loaded platform.

By the use of several of the trucks or wheeled platforms, each adaptedto be engaged with the hoisting mechanism, they may be used for storingmaterials until desired for use. Thus, in a printing establishment,paper as received may be unloaded directly onto one of the wheeledplatforms, conveyed thereon to the storage room, left there until thepaper is desired for use, then wheeled to the hoisting mechanism, andraised into proximity to the feed-table of the press, all withoutnecessitating the rehandling of the paper.

N ow, having described my invention, what Iclaim and desire to secure byLetters Patcut is:

1. In a device for elevating paper to a printing press, a platformprovided with casters so as to be movable upon a floor, projectingvertically perforate lugs at the ends of the platform, a pair of spacedvertical guides disposed adjacent to the feedtahle of a press, headsslidably mounted on said guides, said heads having pins adapted toregister with the lugs on the truck when the latter is disposed betweenthe guides, and means for raising and lowering the heads on the guides,said heads being movable downwardly to positions at which the pins willbe disengaged from the lugs while the truck-casters rest upon a floorbetween the guides.

2. In a device for elevating paper to a printing press, a platformprovided with casters so as to be movable on a floor, a pair of spacedvertical guides disposed adjacent to the feed-table of a press, liftinheads slidaloly mounted on said guides, said heads having projectingparts extending toward each other and having conical upwardly ex tendingpins thereon, projecting lugs at the ends of the platform havingopenings adapted to fit and be automatically centered upon the conicalsins of the lifting-heads, means for simultaneously elevating theliftingheads, and means for retaining the liftingheads at successiveelevated positions.

In testimony whereof I have hereunto subscribed my name in the presenceof two witnesses.

C. A. SIGAFOOS. Witnesses:

D. O. BARNELL, A. R. MITCHELL.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. C.

